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\bibcite{GoK97}{{13}{1997}{{Goldwasser et al.}}{{}}}
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\bibcite{amin2002pdg}{{15}{2002}{{Amin et al.}}{{}}}
\bibcite{GKW02}{{16}{2002}{{Goldwasser et al.}}{{}}}
\bibcite{CFF99}{{17}{1999}{{Conlon et al.}}{{}}}
\bibcite{Gol00}{{18}{1997}{{Goldwasser and Klostermeyer}}{{}}}
\bibcite{gravier2003mdg}{{19}{2003}{{Gravier et al.}}{{}}}
\bibcite{hunziker2004cpo}{{20}{2004}{{Hunziker et al.}}{{}}}
\bibcite{delahan1995aws}{{21}{1995}{{Delahan et al.}}{{}}}
\bibcite{heck1994dpp}{{22}{1994}{{Heck}}{{}}}
\bibcite{pelletier1987msm}{{23}{1987}{{Pelletier}}{{}}}
\bibcite{fraenkel2002tpg}{{24}{2002}{{Fraenkel}}{{}}}
\bibcite{sarkar1998msigmaa}{{25}{1998}{{SARKAR and BARUA}}{{}}}
\bibcite{tollisen2000csg}{{26}{2000}{{Tollisen and Lengyel}}{{}}}
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\bibcite{ArL96}{{36}{1996}{{Arora and Lund}}{{}}}
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\bibcite{DaW89}{{38}{1989}{{Dawes}}{{}}}
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\bibcite{chen2004lta}{{40}{2004}{{Chen et al.}}{{}}}
\bibcite{WaW07TCS}{{41}{2007}{{Wang and Wu}}{{}}}
